High Alumina Brick
Major component of high alumina refractory bricks is α-Al2O3 and Mulite (3Al2O3.2SiO2). Therefore this product has a mechanical strength and high heat resistance, good durability wholesale, low thermal expansion. Thermal resistance of high alumina ceramic products depends on high levels of aluminum in each product.
A type of refractory chamotte brick after the popular, widely used in all types of industrial furnaces in these parts that require high temperature chamotte bricks or tiles dinat not meet.
Based on the thermal resistance corresponding to the content of Al2O3 in the product divided into high alumina refractory bricks of various kinds:
|
No.
|
Properties
|
Unit
|
Type of High Alumina Brick
|
||||
|
HAL-80
|
HAL-70
|
HAL-60
|
HAL-50
|
HAL-45
|
|||
|
1
|
Al2O3 Content
|
%
|
80÷85
|
70÷80
|
60÷65
|
50÷55
|
45÷50
|
|
2
|
Refractoriness
|
0C
|
1790
|
1790
|
1770
|
1750
|
1750
|
|
3
|
Parmanent linear change(2h x temp)
|
%
oC
|
< 0,7
1500
|
< 0,7
1500
|
< 0,6
|
< 0,6
|
< 0,6
|
|
4
|
Refractoriness under load 2kg/cm2
|
oC
|
1550÷
1650
|
1500÷1650
|
1450÷1500
|
1420÷1570
|
1400÷1570
|
|
5
|
Cold crushing strength
|
Mpa
|
100
|
> 80
|
65÷70
|
50÷60
|
40÷50
|
|
6
|
Porosity
|
%
|
18÷20
|
18÷20
|
18÷21
|
18÷21
|
18÷21
|
|
7
|
Bulk density
|
g/cm3
|
> 2.75
|
2.65÷
2.75
|
2.45÷
2.60
|
2.35÷
2.55
|
2.30÷
2.50
|
|
8
|
Thermal shock resistance (850oC-Water)
|
Time
|
>30
|
>30
|
>30
|
>30
|
>30
|
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